Number of days available for climatic review
Parameter | Jan | Feb | Mar | Apr | May | Jun |
Tmax | 121 | 108 | 118 | 138 | 150 | 147 |
Tmin | 123 | 108 | 120 | 141 | 152 | 149 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 125 | 115 | 127 | 142 | 157 | 153 |
Humidity/Visibility | 106 | 95 | 105 | 123 | 136 | 132 |
Parameter | Jul | Aug | Sep | Oct | Nov | Dec |
Tmax | 148 | 150 | 146 | 144 | 144 | 148 |
Tmin | 153 | 150 | 145 | 143 | 146 | 150 |
Duration of sunshine | 0 | 0 | 0 | 0 | 0 | 0 |
Precipitation | 155 | 155 | 152 | 151 | 156 | 156 |
Humidity/Visibility | 132 | 131 | 128 | 124 | 122 | 126 |
Climate data is usually derived from meteorological data of a certain number of years. The actual number of recorded years may vary from only a couple to 50 years or more. The quality of climate data depends on the number of available recorded years. Fewer years means less reliable data. The standart-period for reliable climate data is 30 years. For example, the mean monthly temperature for, let's say January, would ideally calculated from a total number of 930 recorded January-days. However, the usual number of recorded days is much smaller. The table above shows the actual number of recorded days for every parameter measured. |